Material: Full carbon fiber Glossy finish NO logos for nice clean appearance Inside Diameter: 1 1/8" (28.8mm) Top Outside Diameter: 35.0mm Bottom Outside Diameter: 46.0mm Height: 13mm NOTE: Your particular headset may require a 1-3 0.25mm spacers included for proper height Weight: 13 grams OMNI Racer is small young U.S. company with a passion for cycling and dedicated to bringing cyclists some of the most innovative, lightweight, and high quality cycling components to riders that seek only the lightest and best quality products. OMNI Racer's products are engineered to optimize the best structural properties of carbon fiber and high strength alloys, creating components at extremely low weights.